Can you find out the remainder when 3^300 is divided by 5?

Replace the question mark with the correct number in below Picture:

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?

A newspaper is supposed to have 60 pages.Pages 14 and 21 are missing from the newspaper.

Can you tell me , Which other pages won't be there as well ?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Can you write down eight eights so that they add up to one thousand?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?